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80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/**
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******************************************************************************
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* @file paltform_rng.c
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* @author William Xu
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* @version V1.0.0
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* @date 05-May-2014
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* @brief This file provide RNG driver functions.
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******************************************************************************
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* UNPUBLISHED PROPRIETARY SOURCE CODE
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* Copyright (c) 2016 MXCHIP Inc.
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*
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* The contents of this file may not be disclosed to third parties, copied or
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* duplicated in any form, in whole or in part, without the prior written
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* permission of MXCHIP Corporation.
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******************************************************************************
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*/
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#include "platform.h"
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#include "stm32f2xx.h"
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#include "common.h"
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/******************************************************
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* Macros
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******************************************************/
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/******************************************************
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* Enumerations
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******************************************************/
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/******************************************************
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* Type Definitions
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******************************************************/
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/******************************************************
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* Structures
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******************************************************/
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/******************************************************
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* Variables
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******************************************************/
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/******************************************************
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* Function Declarations
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******************************************************/
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OSStatus platform_random_number_read( void *inBuffer, int inByteCount )
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{
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// PLATFORM_TO_DO
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int idx;
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uint32_t *pWord = inBuffer;
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uint32_t tempRDM;
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uint8_t *pByte = NULL;
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int inWordCount;
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int remainByteCount;
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inWordCount = inByteCount/4;
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remainByteCount = inByteCount%4;
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pByte = (uint8_t *)pWord+inWordCount*4;
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RNG_DeInit();
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RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_RNG, ENABLE);
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RNG_Cmd(ENABLE);
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for(idx = 0; idx<inWordCount; idx++, pWord++){
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while(RNG_GetFlagStatus(RNG_FLAG_DRDY)!=SET);
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*pWord = RNG_GetRandomNumber();
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}
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if(remainByteCount){
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while(RNG_GetFlagStatus(RNG_FLAG_DRDY)!=SET);
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tempRDM = RNG_GetRandomNumber();
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memcpy(pByte, &tempRDM, (size_t)remainByteCount);
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}
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RNG_DeInit();
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return kNoErr;
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}
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